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bolt: Set GPIO29 as input in S0, output+high in S3/S5 

This resolves WiFi issues after suspend/resume.

It needs related SPI descriptor soft strap change to
enable SLP_WLAN as a GPIO instead of owned by the ME.

Change-Id: I03f4458d1e52a913770d391061baa6cfa41e8558
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/170577
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
(cherry picked from commit cf1fe0524ad4793c8c422dc3fed3007b7fc96038)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6533
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
This commit is contained in:
Duncan Laurie 2013-09-25 14:05:31 -07:00 committed by Patrick Georgi
parent cff6667eba
commit d988b612c7
2 changed files with 25 additions and 1 deletions
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2
src/mainboard/google/bolt/gpio.h
View File

@ -52,7 +52,7 @@ const struct pch_lp_gpio_map mainboard_gpio_map[] = {
LP_GPIO_UNUSED, /* 26: UNUSED */
LP_GPIO_UNUSED, /* 27: UNUSED */
LP_GPIO_UNUSED, /* 28: UNUSED */
LP_GPIO_NATIVE, /* 29: NATIVE: WLAN_OFF_L */
LP_GPIO_INPUT, /* 29: NATIVE: WLAN_OFF_L */
LP_GPIO_NATIVE, /* 30: NATIVE: PCH_SUSWARN_L */
LP_GPIO_NATIVE, /* 31: NATIVE: ACOK_BUF */
LP_GPIO_NATIVE, /* 32: NATIVE: LPC_CLKRUN_L */

24
src/mainboard/google/bolt/smihandler.c
View File

@ -21,6 +21,7 @@
#include <arch/io.h>
#include <console/console.h>
#include <cpu/x86/smm.h>
#include <southbridge/intel/lynxpoint/lp_gpio.h>
#include <southbridge/intel/lynxpoint/nvs.h>
#include <southbridge/intel/lynxpoint/pch.h>
#include <southbridge/intel/lynxpoint/me.h>
@ -87,6 +88,26 @@ void mainboard_smi_gpi(u32 gpi_sts)
}
}
static void bolt_wlan_off(void)
{
u16 gpio_base = pci_read_config16(PCH_LPC_DEV, GPIO_BASE) & 0xfffc;
u32 gpio_conf;
/* Make sure pin is owned by GPIO subsystem and not ACPI */
gpio_conf = inl(gpio_base + GPIO_OWNER(0));
gpio_conf |= GPIO_OWNER_GPIO << 29;
outl(gpio_conf, gpio_base + GPIO_OWNER(0));
/* Set GPIO29 config to only be reset on RSMRST */
gpio_conf = inl(gpio_base + GPIO_RESET(0));
gpio_conf |= GPIO_RESET_RSMRST << 29;
outl(gpio_conf, gpio_base + GPIO_RESET(0));
/* Set WLAN_OFF_L (GPIO29) as Output GPIO driven high */
gpio_conf = GPIO_MODE_GPIO | GPIO_DIR_OUTPUT | GPO_LEVEL_HIGH;
outl(gpio_conf, gpio_base + GPIO_CONFIG0(29));
}
void mainboard_smi_sleep(u8 slp_typ)
{
/* Disable USB charging if required */
@ -109,6 +130,9 @@ void mainboard_smi_sleep(u8 slp_typ)
break;
}
/* Set WLAN_OFF GPIO state */
bolt_wlan_off();
/* Disable SCI and SMI events */
google_chromeec_set_smi_mask(0);
google_chromeec_set_sci_mask(0);